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Indra Narang,1,2,&ast; Tetyana Kendzerska,3,4,&ast; Austin Heffernan,5 Uzair Malik,6 Carolina G Carvalho,7 Clodagh M Ryan8,9 1Department of Pediatrics, University of Toronto, Toronto, Canada; 2The Hospital for Sick Children, Toronto, Canada; 3Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada; 4The Ottawa Hospital Research Institute, Ottawa, Canada; 5UBC, Faculty of Medicine, Vancouver, Canada; 6RCSI University of Medicine and Health Sciences, Dublin, Ireland; 7University Health Network; 8Department of Medicine, University of Toronto, Toronto, Canada; 9Sleep Research laboratory, KITE-UHN&ast;These authors contributed equally to this workCorrespondence: Clodagh M Ryan, 9N-967 Toronto General Hospital, 585 University Ave., Toronto, Ontario, M5G 2N2, Canada, Email clodagh.ryan@uhn.caBackground: There is increasing prevalence of moderate to severe obstructive sleep apnea (OSA) in adolescents, the majority of whom receive treatment with positive airway pressure (PAP). Adherence to PAP is sub-optimal in adolescents with OSA. Moreover, the impact of transition from pediatric to adult healthcare system on PAP adherence is unknown. This is relevant as the transition period is a time of increased stress for youth with chronic illnesses.Research Question: Does PAP adherence decrease during the 1-year transition period from pediatric to adult healthcare system in those with OSA?Study Design and Methods: Youth previously diagnosed with persistent OSA and treated with PAP in a large academic center (Toronto, Canada) between 2017 and 2019 were enrolled on transfer from the pediatric to adult sleep clinic and followed at 12 months. Mixed-effects linear regression models were used to investigate the effect of time since the transfer on objective PAP adherence with adjustment for confounders.Results: Among the 45 enrolled participants, 42.2% were female, the median age was 18 years (interquartile range [IQR]: 17– 18), median BMI was 30.3 (IQR: 24.0– 37.1), and the median apnea-hypopnea index (AHI) was 17.8 events/hour (11.8– 30.7). In univariate analysis, we observed a significant reduction in the 12-month average PAP usage in days used at follow-up compared to PAP use at the time of enrolment: median of 5.0 hours/day (IQR: 1.3– 8.0) vs 2.6 hours/day (0.0– 6.4), p < 0.0001. Following adjustment for age, level of education, employment status and living arrangement, the 12-month average PAP usage in days remained significantly decreased at follow-up compared to at the time of enrolment: change in hours of − 1.14; 95% CI − 2.27 to − 0.01.Interpretation: Among youth with OSA treated with PAP, there is a clinically significant reduction in PAP adherence over the first year during the transition from pediatric to adult health care.Keywords: CPAP adherence, transition care, obstructive sleep apnea, young adults, CPAP compliance

Theresa A Koleck,1,2 Catherine M Bender,1 Beth Z Clark,3,4 Christopher M Ryan,5,6 Puja Ghotkar,1 Adam Brufsky,4,7,8 Priscilla F McAuliffe,4,8,9 Priya Rastogi,4,7 Susan M Sereika,1,10,11 Yvette P Conley,1,12 1School of Nursing, University of Pittsburgh, Pittsburgh, PA, 2School of Nursing, Columbia University, New York, NY, 3Division of Gynecologic Pathology, Magee-Womens Hospital of University of Pittsburgh Medical Center (UPMC), 4School of Medicine, 5Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, 6Department of Psychiatry, University of California San Francisco, San Francisco, CA, 7Division of Hematology/Oncology, Magee-Womens Hospital of UPMC, 8University of Pittsburgh Cancer Institute, 9Division of Breast Surgical Oncology, Magee-Womens Hospital of UPMC, 10Department of Biostatistics, 11Department of Epidemiology, 12Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA Purpose: Inspired by the hypothesis that heterogeneity in the biology of breast cancers at the cellular level may account for cognitive dysfunction symptom variability in survivors, the current study explored relationships between host single-nucleotide polymorphisms (SNPs) in 25 breast cancer-related candidate genes (AURKA, BAG1, BCL2, BIRC5, CCNB1, CD68, CENPA, CMC2, CTSL2, DIAPH3, ERBB2, ESR1, GRB7, GSTM1, MELK, MKI67, MMP11, MYBL2, NDC80, ORC6, PGR, RACGAP1, RFC4, RRM2, and SCUBE2), identified from clinically relevant prognostic multigene-expression profiles for breast cancer, and pretreatment cognitive performance.Patients and methods: The sample (n=220) was comprised of 138 postmenopausal women newly diagnosed with early stage breast cancer and 82 postmenopausal age- and education-matched healthy controls without breast cancer. Cognitive performance was assessed after primary surgery but prior to initiation of adjuvant chemotherapy and/or hormonal therapy using a comprehensive battery of neuropsychological tests encompassing eight cognitive function composite domains: attention, concentration, executive function, mental flexibility, psychomotor speed, verbal memory, visual memory, and visual working memory. In total, 131 SNPs were included in the analysis. Standard and robust multiple linear regression modeling was used to examine relationships between each domain and the presence or absence of one or more minor alleles for each SNP. Genetic risk/protection scores (GRSs) were calculated for each domain to evaluate the collective effect of possession of multiple risk/protective alleles.Results: With the exception of CMC2, MMP11, and RACGAP1, significant (P

Clodagh M RyanCentre for Sleep Health and Research, University of Toronto/Toronto General Hospital, Toronto, CanadaAbstract: Obstructive sleep apnea is a sleep breathing disorder characterized by recurrent and intermittent hypoxia with continued respiratory effort against a closed glottis. The result of this is a cascade of acute and chronic systemic pathophysiological responses that cause endothelial dysfunction, atherosclerosis and lead to cardiovascular and cerebrovascular disease. This article focuses on the clinical evidence linking obstructive sleep apnea and stroke and on the specific mechanisms perpetuating stroke risk in this population.Keywords: stroke, obstructive sleep apnea, brain injury, atherosclerosis, continuous positive airway pressure, outcomes

© 2015 by the American Diabetes Association.Emerging data suggest that type 1 diabetes is a more aggressive disease in children than in adults, with important differences in pathophysiology and clinical course. Therefore, the efficacy of disease-modifying